In getting my site ready for the new tower many culverts were replaced.
They had been buried 20 to 30/35 years depending on location, and I am uncertain if all of them were actually new culverts when installed.
Most were pin-holed with rust, but several had started to collapse, and here is an shot of some of the old culverts stacked waiting to be transported to the recycling scrap yard:
As typical with old culverts the ends look the best, and the weight bearing portions are pretty messed up.
Very glad to have nice new culverts to drive over now!